Cylinder Works 03-06 Yamaha WR 450 F 450cc +3mm Big Bore Cylinder Kit 478cc 12.5:1 Comp. 98mm

This kit from Cylinder Works gives you everything you need to significantly upgrade your Yamaha WR 450 F's engine. Inside the box, you'll find a precisely matched Vertex piston, a top-end gasket kit, and all the necessary o-rings. This all-in-one package is designed to offer cost savings compared to sourcing each of these essential components separately from the OEM.

The cylinder itself is crafted from a well-built 2618 aluminum alloy, chosen for its strong performance and lasting durability. This material choice helps ensure the cylinder can handle the increased demands placed upon it. The kit is engineered to increase your engine's displacement to 478cc, bumping the compression ratio to a robust 12.5:1. This combination is designed to unlock more horsepower and give your WR 450 F a noticeable boost in performance.

When you're looking to get more out of your machine, a big bore kit like this is a popular way to achieve it. It changes the fundamental size of your engine's combustion chamber, allowing for more air and fuel to be processed with each cycle. This translates directly into more power when you twist the throttle. Remember to consult your service manual for the correct installation procedures and any other components that might need attention during this type of engine work.